2017 Shayrat missile strike
On the morning of 7 April 2017, the United States launched 59 Tomahawk cruise missiles from the Mediterranean Sea into Syria, aimed at Shayrat Airbase controlled by the Syrian government. The strike was executed on the authorization of U.S. president Donald Trump, as a direct response to the Khan Shaykhun chemical attack that occurred on 4 April.
Source: Wikipedia — 2017 Shayrat missile strike (CC BY-SA 4.0)